Sensor error when processing probe: the sensor's major version = version_number while its probe's major version = version_numberIssue After an upgrade or probe/sensor customization, the sensor cannot process the probe's payload and the following error is seen: Sensor error when processing <probe_link>: The <sensor_link>'s major version = <version_number> while its <probe_link>'s major version = <version_number> Note: If the error is specifically for "Windows - Installed Software: The sensor's major version = 5 while its related probe's major version = 4", then read this instead: KB0860580 Removing customisations of Discovery Windows WMI probes, that had been applied for the changes in Madrid Patch 3/New York CauseA sensor's major version must match its corresponding probe's major version. A sensor must know how the payload is structured in order to process it successfully. If the major version of the sensor/probe combination is different, the probe's output is probably not formatted as the sensor expects. This could cause further errors and unexpected behavior.ResolutionA: Revert sensor to OOB version In some cases, an OOB sensor may be customized. After an upgrade, the customized version may no longer match with the newly upgraded probe's major version. If the new OOB sensor is to be used: Click on the sensorUnder the "Versions" Related list select the upgraded versionClick on "Revert to this version" related link Note: In the following example, the error is for the Windows - Classify probe; however, the steps would be the same for other probes/sensor combinations. B: Update sensor version through XML To resolve the error, the probe/sensor major version must match. This can be done by updating the sensor or the probe. In the following procedure, the sensor version is updated. Click on the link for both the probe and sensor in the error message Review the probe/sensor. Export the sensor. Update the sensor's major_version to match the probe's major_version. Re-import the sensor XML file. If the following figure does not match your instance version, see the product documentation topic Export and import XML files. Run discovery again.